How much does hvac replacement cost in Longmont, CO?

Most Longmont homeowners spend between $5,800 – $18,900 on hvac replacement, with an average around $9,650. Local labor prices 5% above the national average, so Longmont quotes tend to land at the higher end of national ranges.

Why is hvac replacement more or less expensive in Longmont than elsewhere?

Licensed trade labor in Longmont runs about 105% of the national average, and the best crews book out fastest in spring and early summer. Colorado weather drives material choices here, so ask contractors what they install most often in Longmont and why.

Do I need a permit for hvac replacement in Longmont, Colorado?

Most Longmont, CO projects that change structure, electrical, plumbing or mechanical systems need a permit from the local building department; cosmetic work usually does not. Always confirm current requirements with the local building department before signing a contract, and make sure the permit is pulled by your licensed contractor.

How many quotes should I get in Longmont?

Get at least three written quotes from licensed, insured Colorado contractors. Comparing line items — not just the bottom line — is the fastest way to spot an inflated bid in the Longmont metro market.

How much does it cost to replace an HVAC system?

$5,500 to $18,000 installed, averaging about $9,200 for a complete system in a typical single-family home.

How long does an HVAC system last?

Central AC and heat pumps last 12–17 years, gas furnaces 15–25 years. Replace rather than repair once you cross about 75% of that life.

What size system do I need?

Roughly one ton per 500–600 square feet as a starting point, but insist on a Manual J calculation — climate, insulation and windows change the answer.

Is a heat pump cheaper than a furnace?

A heat pump costs more upfront but usually cuts total energy bills where electricity is reasonably priced, and it qualifies for a larger tax credit.

How long does installation take?

One day for a straight equipment swap; two to four days if the ductwork or electrical service is being replaced.

Home/Cost guides/HVAC Replacement/Longmont, CO

Longmont metro · Colorado

HVAC Replacement cost in Longmont, CO

Longmont homeowners typically pay $5,800 – $18,900 for hvac replacement. Local labor and materials price 5% above the national average.

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Longmont average

$9,650

Typical low

$5,800

Typical high

$18,900

Per ton of cooling capacity

$1,900 – $2,950

Sample ZIP

What drives Longmont pricing

Local labor

Licensed trade labor in Longmont runs about 105% of the national average, and the best crews book out fastest in spring and early summer.

Permits & code

Most Longmont, CO projects that change structure, electrical, plumbing or mechanical systems need a permit from the local building department; cosmetic work usually does not.

Climate & conditions

Colorado weather drives material choices here, so ask contractors what they install most often in Longmont and why.

Instant cost calculator

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System size3 tons

System type

Efficiency

Ductwork

Equipment location

Estimated project cost

$4,350 – $8,250

Most homeowners pay around $6,300

Compare system type

Cost by material in Longmont

Installed Longmont pricing per ton of cooling capacity.

Option	Installed cost	Pros	Cons
Central air conditioner	$4,200 – $9,450	Lowest cost cooling upgrade if ducts exist.	Needs a separate heat source.
Gas furnace	$3,700 – $7,900	Cheapest heat in cold climates with cheap gas.	Requires venting and combustion safety checks.
Heat pump	$5,800 – $12,600	Heats and cools; often qualifies for tax credits up to $2,000.	Needs backup heat in very cold climates.
Ductless mini-split	$3,150 – $10,500	No ducts needed, zone by zone control.	Indoor heads are visible on the wall.
Geothermal	$18,900 – $47,300	Lowest operating cost and 25+ year life.	Requires drilling or a large loop field.

Where the money goes in Longmont

A typical $9,650 Longmont project, broken down by line item.

Equipment50% · $4,825
Labor & installation30% · $2,895
Ductwork & line set13% · $1,255
Permit, startup & disposal7% · $676

Common add-ons

Extras that show up on Longmont quotes but rarely in the headline price.

Full duct replacement

$2,100 – $6,300

Duct sealing & insulation

$735 – $2,650

Smart thermostat

$190 – $630

Whole-home air purifier

$630 – $2,650

Whole-home humidifier

$420 – $1,250

Electrical panel upgrade for heat pump

$1,600 – $4,200

Permit & inspection

$105 – $525

Ways to save in Longmont

Replace in spring or fall — mid-summer emergency swaps carry a 10–20% premium.
Claim the 25C federal tax credit: up to $2,000 for a qualifying heat pump, $600 for AC or furnace.
Check your utility's rebate portal; many add $500–$1,500 on high-efficiency equipment.
Right-size with a Manual J load calculation — oversized systems cost more and short-cycle.
Don't over-buy SEER in mild climates; the payback can exceed the equipment's life.

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